Put the oil in a deep 12-inch skillet or wok, preferably nonstick, over medium-high heat.,A minute later, add the garlic, ginger, and hot pepper and cook just until they begin to sizzle, less than a minute.,Add the pork and stir to break it up; cook, stirring occasionally, until it loses most of its pink color.,Add the scallion and stir; add the stock.,______,Cook, stirring once or twice, until the tofu is heated through, about 2 minutes.,Stir in the soy sauce, taste, and add salt and hot pepper as necessary.,Garnish with the cilantro if you like and serve.